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Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451
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Hybrid PET/MRI Imaging of Alzheimer's Disease Based on 18F-AV-1451

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アルツハイマー病イメージングコンソーシアム

Charles D Chen1, Cinthya Aguero2, Alexandra N Melloni2

  • 1Massachusetts General Hospital, Charlestown, MA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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PubMed
まとめ
この要約は機械生成です。

アミロイドβおよびタウの陽電子放出断層撮影(PET)バイオマーカーは脳病理を予測するが、タウPETはタウ神経原線維変化分布を正確に反映するために外れ値の調整が必要である。個別のタウPET測定値は神経病理学的評価の予測を改善する。

キーワード:
アルツハイマー病タウアミロイドPET神経病理脳バイオマーカーイメージング加齢縦断研究

さらに関連する動画

Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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Lesion Explorer: A Video-guided, Standardized Protocol for Accurate and Reliable MRI-derived Volumetrics in Alzheimer's Disease and Normal Elderly
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Visualization of Amyloid β Deposits in the Human Brain with Matrix-assisted Laser Desorption/Ionization Imaging Mass Spectrometry
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科学分野:

  • 神経画像法; 神経病理学; アルツハイマー病研究

背景:

  • ハーバード加齢脳研究(HABS)は、正常な加齢とアルツハイマー病(AD)の前臨床期との違いを調査しています。16人のHABS参加者が神経病理学的評価のために脳を提供しました。本研究では、死後神経病理学的所見に対する生前PETバイオマーカーの予測力を評価します。

研究 の 目的:

  • 生前のPETバイオマーカー(アミロイドβおよびタウ)と死後の神経病理学的評価を比較すること。PETイメージング測定値とアミロイドプラークおよびタウタンブルの負担/分布との相関を決定すること。PET所見と神経病理学との間の不一致に寄与する要因を特定すること。

主な方法:

  • アミロイドプラーク(Thal段階/Aスコア)、タウタンブル(Braak NFT段階/Bスコア)、および神経突起プラーク(CERAD NPスコア/Cスコア)の神経病理学的評価。アミロイドβPET(PiB)測定値には、前頭葉、外側側頭葉、頭頂葉、および後帯状皮質(FLR)の分布容積比(DVR)および空間的範囲(EXT)が含まれていました。タウPET(フロルタウピル、FTP)測定値には、両側および外側で分析された、全側頭葉、内側側頭葉(MTL)、および側頭葉新皮質(NEO-T)の標準化取り込み値比(SUVR)が含まれていました。

主要な成果:

  • アミロイドβPET(PiB)DVRおよびEXTは、アミロイドプラーク(A)およびCERAD(C)スコアと有意に相関しました。初期のタウPET(FTP)SUVRは、Braak(B)段階と有意に相関しませんでした。外れ値を除外した後、全側頭葉およびNEO-T SUVRはBスコアと有意に相関しました。外側化SUVRはこれらの相関をさらに強化しました。

結論:

  • アミロイドβPET測定値は、アミロイドプラークの分布と密度によく一致します。タウPET測定値は、外れ値に対処した後でのみタウタンブルの分布と相関し、PETと神経病理学の不一致はタウでより一般的であることを示唆しています。タウ病理学の不均一性を考慮した個別のタウPET測定値は、神経病理学的評価の正確な予測に不可欠です。